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Proteins and Their Functions (GATE - XL)

Proteins and Their Functions, GATE - XL, Proteins

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following proteins plays an important role in the precise interactions between photoreceptor neuronal synapse and the bipolar dendrons?

  1. Pikachurin
  2. Arp2/3
  3. FtsZ
  4. Keratin
  5. Elastin
Question 2 Multiple Choice (Single Answer)

In humans, which of these proteins is secreted by the cells of floor plate?

  1. Fibronectin
  2. Integrin
  3. F-spondin
  4. Selectin
  5. Protein Z
Question 3 Multiple Choice (Single Answer)

Which of the following proteins connect(s) the cytoskeleton of a myocyte to the surrounding extracellular matrix through the cytoplasmic membrane?

  1. Dystrophin
  2. Tubulin
  3. Fibronectin
  4. Ribonucleoprotein
  5. Chaperones
Question 4 Multiple Choice (Single Answer)

Which of the following pairs of 'protein - its function' is incorrectly matched?

  1. Antiporter - involved in secondary active transport of two or more different molecules or ions across a phospholipid membrane
  2. Uniporter - integral membrane protein that is involved in facilitated diffusion
  3. Cotransporters - downward movement of one solute from high to low concentration to move another molecule upward from low to high concentration
  4. Symporter - transports differing types of molecules across the cell membrane
  5. Antiport - two species of ion or other solutes are pumped in opposite directions across a membrane
Question 5 Multiple Choice (Single Answer)

Which of the following statements is/are incorrect about G protein-coupled receptors?

A. They are found in all eukaryotes and prokaryotes.
B. They are involved in many diseases and target approximately 40% of all modern medicinal drugs.
C. When a ligand binds to a GPCR, it causes a conformational change in the GPCR.

  1. Only A
  2. Only B
  3. Only C
  4. Only A and B
  5. Only B and C
Question 6 Multiple Choice (Single Answer)

Which of the following statements is/are false about DNA binding proteins?

  1. In humans, replication protein A is used in processes where the double helix is separated, including DNA replication, recombination and DNA repair.
  2. DNA-binding proteins have specific affinity for only double stranded DNA.
  3. Sequence-specific DNA-binding proteins generally interact with the major groove of B-DNA.
  1. Only 1
  2. Only 2
  3. Only 3
  4. Only 1 and 2
  5. Only 2 and 3
Question 7 Multiple Choice (Single Answer)

Match the following.

 
Column – I Column – II
A. CFTR 1. Membrane protein
B. CRP 2. Glycoprotein
C. Protein S 3. Light-sensitive receptor protein
D. Rhodopsin 4. Pentameric protein
  1. A - 1, B - 2, C - 3, D - 4
  2. A - 1, B - 4, C - 2, D - 3
  3. A - 2, B - 4, C - 3, D - 1
  4. A - 2, B - 3, C - 4, D - 1
  5. A - 4, B - 1, C - 2, D - 3
Question 8 Multiple Choice (Single Answer)

Which of the following multi-functional globular proteins is/are found in all eukaroyotic cells, except nematode sperm?

  1. Actin
  2. Tubulin
  3. Complement proteins
  4. Collagen
  5. C1-inhibitor
Question 9 Multiple Choice (Single Answer)

Match the following.

 
List – I List – II
P. Histone 1. Globular protein
Q. Protamine 2. Y-shaped protein
R. Immunoglobulin 3. Nuclear protein
S. Ferritin 4. Alkaline protein
  1. P - 1, Q - 2, R - 3, S - 4
  2. P - 1, Q - 3, R - 2, S - 4
  3. P - 2, Q - 4, R - 3, S - 1
  4. P - 2, Q - 3, R - 4, S - 1
  5. P - 4, Q - 3, R - 2, S - 1
Question 10 Multiple Choice (Single Answer)

Which of the following proteins protects from strokes and neural regeneration?

  1. Ependymin
  2. Integrin
  3. Cadherin
  4. Selectin
  5. NCAM
Question 11 Multiple Choice (Single Answer)

Which of the following statements is/are true about spheroproteins?

P. Spheroproteins form adducts in water, unlike fibrous or membrane proteins.
Q. The spherical structure is induced by the protein's tertiary structure.
R. Globular proteins have a mechanism for protein folding, which is nucleation condensation model.

  1. Only P
  2. Only Q
  3. Only R
  4. Only P and Q
  5. Only P and R
Question 12 Multiple Choice (Single Answer)

Which of the following plays an important role in maintaining the shape of erythrocytes and regulating their membrane material properties?

  1. Scramblase
  2. CFTR
  3. Hemeprotein
  4. Ependymin
  5. Glycophorin C
Question 13 Multiple Choice (Single Answer)

Which of the following statements is/are incorrect about acute-phase proteins?

A. The liver responds by producing a large number of acute-phase proteins.
B. Positive acute-phase proteins serve similar physiological functions for the immune system.
C. Negative acute-phase proteins decrease inflammation.

  1. Only A
  2. Only B
  3. Only C
  4. Only A and B
  5. Only B and C
Question 14 Multiple Choice (Single Answer)

Which of the following proteins circulating in the blood inhibits factors Xa and XIa of the clotting cascade?

  1. Factor XIII
  2. Protein Z-related protease inhibitor
  3. Factor VIII
  4. Protein S
  5. Protein C
Question 15 Multiple Choice (Single Answer)

Match the column – I (Proteins) with column – II (Immune system function).

 
Column – I Column – II
A. Alpha 2-macroglobulin 1. Inhibitor of fibrinolysis by inhibiting plasmin
B. Hepcidin 2. Induction of enzymes that degrade extracellular matrix
C. Serum amyloid A 3. Opsonin on microbes
D. C-reactive protein 4. Stimulates the internalisation of ferroportin
  1. A - 1, B - 2, C - 3, D - 4
  2. A - 1, B - 4, C - 2, D - 3
  3. A - 2, B - 4, C - 3, D - 1
  4. A - 2, B - 3, C - 4, D - 1
  5. A - 4, B - 1, C - 2, D - 3
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